Cooling fan structure design principle(3)

4. Types of Fan airfoil

1) Forward curved type (forward swept wing) :

The fan aerofoil is curved forward along the direction of the fan operation, which is also known as the multi-aerofoil fan blade in the blower

2) Back bend type (swept-back wing) :

The fan airfoil is bent back along the direction of the fan and is used in the blower, also known as the wheel type fan blade

3) Radial type (radiation wing) :

The blade airfoil extends outward along the center of the fan